SoC blockset pwm write period adjustment

Question

Guido de Hek 2022-3-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1661070-soc-blockset-pwm-write-period-adjustment

回答： Guido de Hek 2023-1-19

Hi all,

Using SoC blockset, I am trying to generate PWM pulses using a C2000 target (F28388D). Both in simulation and on the target, I am able to produce PWM pulses. For my application I want to adjust the switching frequency while the system is running. I am trying to achieve this using the period input in the PWM write block, but regardless of what I try, the switching period remains unchanged. Also, in the documentation, a unit for the period input is not specified.

Does anyone have suggestions on how to proceed? Which unit to use for the period input?

Thanks in advance for your input.

Guido de Hek

Attachment: PWM peripheral settings:

System model:

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Guido de Hek 2023-1-19

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1661070-soc-blockset-pwm-write-period-adjustment#answer_1151795

I've found out that the period input is in seconds, and the compare input is ranged between 0 and 1. When using CMPA and CMPB and a PWM generator in up-count mode, the compare input can be a bus (first element is the CMPA value and the second element is the CMPB value).